Piston rod of slurry pump for petroleum drilling

Abstract

The utility model relates to the technical field of oil drilling mud pumps, in particular to an oil drilling mud pump piston rod which comprises an inner threaded rod, a rear rod assembly and a front rod assembly, a fixing ring is fixed on the outer side of the inner threaded rod, sealing gaskets are arranged on the two sides of the fixing ring, and the inner threaded rod is of a hollow structure penetrating front and back. A rear rod assembly is installed on the rear side of the inner threaded rod, and a front rod assembly is installed on the front side of the inner threaded rod. The device has the beneficial effects that the front side and the rear side of the inner threaded rod can be conveniently and spirally connected and assembled with the rear rod assembly and the front rod assembly, damaged parts can be conveniently replaced through the split type structure, and sealing gaskets on the front side and the rear side of a fixing ring can play a sealing role; the negative-pressure suction nozzle can be externally connected with a negative-pressure suction pump so as to vacuumize the interiors of the connected internal threaded rod, the rear piston rod and the front piston rod, and meanwhile, the internal threaded rod, the rear piston rod and the front piston rod are tightly connected and are not prone to loosening due to the negative-pressure structure.

Description

Technical Field

[0001] The utility model relates to the technical field of oil drilling mud pumps, in particular to a piston rod of an oil drilling mud pump. Background Art

[0002] Oil drilling mud pump refers to the mud pump used in the oil drilling field. The mud pump is a key equipment in oil drilling work. Its good operation is directly related to the success or failure of oil drilling work. The mud pump piston rod is an indispensable mud pump accessory.

[0003] For example, the utility model application number CN202222447104.X discloses a mud pump piston rod. Similar to the mud pump piston rod in the above application, there are still the following shortcomings: the piston rod is an integral structure, and when there is severe local wear or local damage, the entire piston rod needs to be replaced, which is relatively costly.

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and a piston rod of an oil drilling mud pump is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a piston rod for a petroleum drilling mud pump to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: A piston rod of an oil drilling mud pump, comprising: an internally threaded rod, a rear rod assembly and a front rod assembly, a fixing ring being fixed to the outer side of the internally threaded rod, and sealing gaskets being provided on both sides of the fixing ring, and the internally threaded rod is a hollow structure penetrating from front to back, a rear rod assembly being installed on the rear side of the internally threaded rod, and a front rod assembly being installed on the front side of the internally threaded rod, the front rod assembly comprising a front piston rod, a connecting ring and an anti-slip layer, a connecting ring being fixed to the outer side of the front piston rod, and an anti-slip layer being provided on one side of the connecting ring, a connecting sealing assembly being provided at the front end of the front piston rod, and the connecting sealing assembly comprising a retaining ring and a negative pressure suction nozzle, the retaining ring being fixedly connected to the front piston rod, and a negative pressure suction nozzle being provided at the middle part of the front end of the front piston rod.

[0007] Preferably, the rear rod assembly includes a rear piston rod, an anti-slip ring, an anti-wear ring and a thickening layer. The outer side of the rear piston rod is fixed with an anti-slip ring, and the rear side of the anti-slip ring is fixed with an anti-wear ring, and the outer side of the anti-wear ring is integrated with a thickening layer.

[0008] Preferably, the interiors of the rear piston rod and the front piston rod are both hollow structures, and the inner walls of the rear piston rod and the front piston rod are both provided with internal threads, and the rear piston rod and the front piston rod are threadedly connected to the internal threaded rod.

[0009] Preferably, the connection sealing assembly further comprises a fixing frame, a spring, and a clamping block. The front end of the front piston rod is provided with three fixing frames, and the interior of the fixing frame is connected to the clamping block via a spring.

[0010] Preferably, the connection sealing assembly further includes a sleeve cover, a sealing ring and a slot. The front end of the front piston rod is equipped with a sleeve cover, a sealing ring is provided on one side of the sleeve cover, and a slot is provided on the inner side of the sleeve cover at a position corresponding to the retaining ring.

[0011] Preferably, the connection sealing assembly further comprises an insert, and three inserts are fixed to the inner ring of the cover, and the inserts are snap-fitted to the fixing frame.

[0012] Preferably, a reducing sleeve is sleeved on the outer side of the front end of the front piston rod, and a gasket is provided on the side of the reducing sleeve close to the anti-slip layer, and a locking bolt passes through the rear side of the connecting ring.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] The utility model discloses a petroleum drilling mud pump piston rod, and the front and rear sides of the internal threaded rod are convenient for spirally rotating and assembling with the rear rod assembly and the front rod assembly respectively. The split structure is convenient for replacing damaged parts without directly replacing the entire piston rod, thus saving costs. The sealing gaskets on the front and rear sides of the fixing ring can play a sealing role. The negative pressure suction nozzle can be externally connected to a negative pressure suction pump to vacuum the inside of the connected internal threaded rod, the rear piston rod, and the front piston rod. At the same time, the negative pressure structure makes the internal threaded rod, the rear piston rod, and the front piston rod tightly connected and not easy to loosen.

[0015] The hollow reducing sleeve can be sleeved on the outside of the front end of the front piston rod, and the reducing sleeve can be set to different diameters to meet different usage requirements. The gasket of the reducing sleeve can fit tightly with the anti-slip layer on one side of the connecting ring. At the same time, the locking bolt passes through the outer edge of the connecting ring and the reducing sleeve to facilitate the connection and fixation between the two, and at the same time make the reducing sleeve replaceable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall explosion structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the assembly structure of the rear rod assembly and the front rod assembly of the utility model;

[0018] Figure 3 This is a schematic diagram of the assembly structure of the rear rod assembly, the front rod assembly and the reducing sleeve of the utility model;

[0019] Figure 4 This is a schematic diagram of the expanded structure of the connection and sealing assembly of the front piston rod of the utility model.

[0020] Figure: 1. Internally threaded rod; 2. Retaining ring; 3. Sealing gasket; 4. Rear rod assembly; 401. Rear piston rod; 402. Anti-slip collar; 403. Anti-wear ring; 404. Thickening layer; 5. Front rod assembly; 501. Front piston rod; 502. Connecting collar; 503. Anti-slip layer; 6. Locking bolt; 7. Connecting seal assembly.

[0021] 701, retaining ring; 702, negative pressure nozzle; 703, fixing frame; 704, spring; 705, clamping block; 706, cover; 707, sealing ring; 708, slot; 709, insert; 8, reducing sleeve; 9, gasket. DETAILED DESCRIPTION

[0022] In order to clearly and completely describe the purpose and technical solution of the present invention and make its advantages more clearly understood, the following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention and are not intended to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Example 1

[0024] See also Figures 1-4 The utility model provides a technical solution: a piston rod of a petroleum drilling mud pump, comprising: an internal threaded rod 1, a rear rod assembly 4 and a front rod assembly 5, a fixing ring 2 is fixed to the outside of the internal threaded rod 1, and sealing gaskets 3 are provided on both sides of the fixing ring 2, and the internal threaded rod 1 is a hollow structure running through the front and back, the rear side of the internal threaded rod 1 is installed with the rear rod assembly 4, and the front side of the internal threaded rod 1 is installed with the front rod assembly 5, the rear rod assembly 4 includes a rear piston rod 401, an anti-slip collar 402, an anti-wear ring 403 and a thickening layer 404, the outer side of the rear piston rod 401 is fixed with an anti-slip collar 402, and the anti-slip An anti-wear ring 403 is fixed to the rear side of the collar 402, and a thickened layer 404 is integrated on the outer side of the anti-wear ring 403; the front rod assembly 5 includes a front piston rod 501, a connecting collar 502 and an anti-slip layer 503, the outer side of the front piston rod 501 is fixed with a connecting collar 502, and one side of the connecting collar 502 is provided with an anti-slip layer 503, the interior of the rear piston rod 401 and the front piston rod 501 are both hollow structures, and the inner walls of the rear piston rod 401 and the front piston rod 501 are both provided with internal threads, and the rear piston rod 401 and the front piston rod 501 are threadedly connected to the internal threaded rod 1;

[0025] The rear piston rod 401 and the front piston rod 501 are both hollow structures and the inner walls of both are provided with internal threads, so that the front and rear sides of the internal threaded rod 1 can be easily spirally connected and assembled with the rear rod assembly 4 and the front rod assembly 5 respectively, so that the piston rod consists of the internal threaded rod 1 and the front and rear parts. The split structure is convenient for replacing the damaged part without directly replacing the entire piston rod, saving costs. The sealing gaskets 3 on the front and rear sides of the fixing ring 2 can play a sealing role, and cooperate with the connecting sealing assembly 7 to facilitate enhancing the sealing of the connection between the internal threaded rod 1, the rear piston rod 401, and the front piston rod 501. The anti-slip ring 402, anti-wear ring 403 and thickening layer 404 on the outside of the rear piston rod 401 can enhance the service life. The connecting ring 502 and anti-slip layer 503 of the front piston rod 501 facilitate the connection and assembly between it and the reducing sleeve 8.

[0026] Example 2

[0027] On the basis of embodiment 1, the front end of the front piston rod 501 is provided with a connecting sealing component 7, and the connecting sealing component 7 includes a clamping ring 701 and a negative pressure suction nozzle 702, the clamping ring 701 is fixedly connected to the front piston rod 501, and the middle part of the front end of the front piston rod 501 is provided with a negative pressure suction nozzle 702; the connecting sealing component 7 also includes a fixing frame 703, a spring 704, and a clamping block 705. The front end of the front piston rod 501 is provided with three fixing frames 703, and the interior of the fixing frame 703 is connected by a spring. The spring 704 is connected to a clamping block 705; the connection sealing assembly 7 also includes a cover 706, a sealing ring 707 and a clamping groove 708. The front end of the front piston rod 501 is installed with a cover 706, and a sealing ring 707 is provided on one side of the cover 706. A clamping groove 708 is provided on the inner side of the cover 706 at a position corresponding to the clamping ring 701; the connection sealing assembly 7 also includes an insert 709. Three inserts 709 are fixed to the inner ring of the cover 706, and the inserts 709 are clamped and connected to the fixed frame 703.

[0028] The internal threaded rod 1 is a hollow structure that runs through the front and back. At the same time, the interiors of the rear piston rod 401 and the front piston rod 501 are both hollow structures, so that the negative pressure suction nozzle 702 can be externally connected to a negative pressure suction pump to vacuum the interiors of the connected internal threaded rod 1, the rear piston rod 401, and the front piston rod 501. At the same time, the negative pressure structure makes the internal threaded rod 1, the rear piston rod 401, and the front piston rod 501 tightly connected and not easy to loosen; the cover 706 can cover the outside of the negative pressure suction nozzle 702 at the front end of the front piston rod 501 to protect the negative pressure suction nozzle 702. At the same time, the card slot 708 of the cover 706 can be engaged with the clamping ring 701 of the front piston rod 501, and the three inserts 709 can be embedded in the interior of the three fixing frames 703, so that the three clamping blocks 705 can clamp the three inserts 709 under the action of the spring 704, further improving the connection tightness of the cover 706.

[0029] Example 3

[0030] On the basis of the second embodiment, a reducing sleeve 8 is provided on the outer side of the front end of the front piston rod 501, and a gasket 9 is provided on the side of the reducing sleeve 8 close to the anti-slip layer 503, and a locking bolt 6 is passed through the rear side of the connecting ring 502;

[0031] The hollow reducing sleeve 8 can be sleeved on the outer side of the front end of the front piston rod 501, and the reducing sleeve 8 can be set to different diameters to meet different usage requirements. The gasket 9 of the reducing sleeve 8 can fit tightly with the anti-slip layer 503 on one side of the connecting ring 502. At the same time, the locking bolt 6 passes through the outer edge of the connecting ring 502 and the reducing sleeve 8 to facilitate the connection and fixation between the two, and at the same time make the reducing sleeve 8 replaceable.

[0032] In actual use, a mud pump is required for oil drilling. In the piston rods of the mud pump, the rear piston rod 401 and the front piston rod 501 are both hollow structures. At the same time, the inner walls of both are provided with internal threads, so that the front and rear sides of the internal threaded rod 1 can be spirally connected and assembled with the rear rod assembly 4 and the front rod assembly 5 respectively. At this time, the sealing gaskets 3 on the front and rear sides of the fixing ring 2 can play a sealing role. Then, the negative pressure suction nozzle 702 can be externally connected to the negative pressure suction pump to vacuum the internal threaded rod 1, the rear piston rod 401, and the front piston rod 501 after connection. At the same time, the negative pressure structure makes the internal threaded rod 1, the rear piston rod 401, and the front piston rod 501 tightly connected and not easy to loosen.

[0033] Then, the cover 706 is placed on the outside of the negative pressure nozzle 702 at the front end of the front piston rod 501 to protect the negative pressure nozzle 702. At this time, the clamping groove 708 of the cover 706 can be engaged with the clamping ring 701 of the front piston rod 501, and the three inserts 709 can be embedded in the interior of the three fixing frames 703, so that the three clamping blocks 705 can clamp the three inserts 709 under the action of the spring 704, further improving the tightness of the connection of the cover 706.

[0034] During use, the piston rod of the oil drilling mud pump can also be equipped with a reducing sleeve 8, so that the hollow reducing sleeve 8 is sleeved on the outside of the front end of the front piston rod 501. At this time, the gasket 9 of the reducing sleeve 8 can fit tightly with the anti-slip layer 503 on one side of the connecting ring 502. At the same time, the locking bolt 6 passes through the outer edge of the connecting ring 502 and the reducing sleeve 8 to achieve the connection and fixation between the two. At the same time, the reducing sleeve 8 is replaceable, and the reducing sleeve 8 can be set to different diameters to meet different usage requirements.

[0035] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A piston rod of a petroleum drilling mud pump, characterized in that: The oil drilling mud pump piston rod comprises: an internal threaded rod (1), a rear rod assembly (4) and a front rod assembly (5); a fixing ring (2) is fixed on the outer side of the internal threaded rod (1), and sealing pads (3) are arranged on both sides of the fixing ring (2); the internal threaded rod (1) is a hollow structure penetrating from front to back; the rear side of the internal threaded rod (1) is installed with the rear rod assembly (4), and the front side of the internal threaded rod (1) is installed with the front rod assembly (5); the front rod assembly (5) comprises a front piston rod (501), a connecting ring (502), and a connecting ring (503). 02) and an anti-slip layer (503), a connecting ring (502) is fixed on the outer side of the front piston rod (501), and an anti-slip layer (503) is provided on one side of the connecting ring (502), a connecting sealing component (7) is provided at the front end of the front piston rod (501), and the connecting sealing component (7) includes a retaining ring (701) and a negative pressure suction nozzle (702), the retaining ring (701) is fixedly connected to the front piston rod (501), and a negative pressure suction nozzle (702) is provided in the middle of the front end of the front piston rod (501).

2. The oil drilling mud pump piston rod according to claim 1, characterized in that: The rear rod assembly (4) comprises a rear piston rod (401), an anti-slip collar (402), an anti-wear ring (403) and a thickening layer (404); the anti-slip collar (402) is fixed to the outer side of the rear piston rod (401), the anti-wear ring (403) is fixed to the rear side of the anti-slip collar (402), and the outer side of the anti-wear ring (403) is integrally provided with a thickening layer (404).

3. The oil drilling mud pump piston rod according to claim 2, characterized in that: The interiors of the rear piston rod (401) and the front piston rod (501) are both hollow structures, and the inner walls of the rear piston rod (401) and the front piston rod (501) are both provided with internal threads, and the rear piston rod (401) and the front piston rod (501) are threadedly connected to the internal threaded rod (1).

4. The oil drilling mud pump piston rod according to claim 1, characterized in that: The connection sealing assembly (7) further comprises a fixing frame (703), a spring (704), and a clamping block (705). The front end of the front piston rod (501) is provided with three fixing frames (703), and the interior of the fixing frame (703) is connected to the clamping block (705) via the spring (704).

5. The oil drilling mud pump piston rod according to claim 4, characterized in that: The connection sealing assembly (7) further comprises a sleeve cover (706), a sealing ring (707) and a retaining groove (708); the front end of the front piston rod (501) is provided with a sleeve cover (706), a sealing ring (707) is provided on one side of the sleeve cover (706), and a retaining groove (708) is provided on the inner side of the sleeve cover (706) at a position corresponding to the retaining ring (701).

6. The oil drilling mud pump piston rod according to claim 5, characterized in that: The connection sealing assembly (7) further comprises an insert (709), three inserts (709) are fixed to the inner ring of the sleeve cover (706), and the inserts (709) are snap-fittedly connected to the fixing frame (703).

7. The oil drilling mud pump piston rod according to claim 1, characterized in that: A reducing sleeve (8) is sleeved on the outer side of the front end of the front piston rod (501), and a gasket (9) is provided on the side of the reducing sleeve (8) close to the anti-slip layer (503), and a locking bolt (6) penetrates the rear side of the connecting ring (502).

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